<nz-tabset>
    <nz-tab nzTitle="Tab 1">
        <nz-upload nzAction="https://www.mocky.io/v2/5cc8019d300000980a055e76"
            [nzHeaders]="{ authorization: 'authorization-text' }" 
            [nzBeforeUpload]="beforeUpload"
            (nzChange)="handleChange($event)"
            >
            
            <button nz-button>
                <i nz-icon nzType="upload"></i>Click to Upload
            </button>
        </nz-upload>
    </nz-tab>
    <nz-tab nzTitle="Tab 2">
        Content of Tab Pane 2
    </nz-tab>
    <nz-tab nzTitle="Tab 3">
        Content of Tab Pane 3
    </nz-tab>
</nz-tabset>